Hair dye



Patented 1Q, 1924,

ST S

TENT DFFICE.

RALPH L. EVANS, OF NEW YORK, N. Y.

HAIR DYE.

Io Drawing.

' the following is a specification.

In hair dyes where aromatic amino compounds are used, it is well known that the amine has a poisonous and therefore very deleterious effect on the skin of the user and different attempts have been made from time I to time toreduce these bad effects. as, for

instance, by the use of reducing agents as sodium sulfite for the amino compound. This method has been found in actual practice to be ineflicient and unsatisfactory.

. My invention is directed to the production of hair dyes containing aromatic amino compounds in which the poisonous effectv of the amine is reduced to a minimum or eliminated entirely, by chemically coupling with the amino compounds other compounds which are not intended to be used as reducing agents but which serve to muzzle the amine, not b forming a nuclear derivative, but by coup ing it through the nitrogen to form a slightly disassociated compound by a reversible reaction, which compound acts as a reservoir, liberating the amine as it is used up by the usual oxidizing agent such for instance as hydrogen peroxide in the process of dyeing. When so'combined the amine is not readily absorbed by theskin and its poisonous efi'ectis thereby reduced to a.- minimum. v

The following is an illustrating reaction.

I CH; I

(c) NeHa+CHa-C0-CHa:NaOSO CHO 8 sodium Nnulphlte acetone. Acetone sodium b ulphlte.

N aO-S- 0 p H HsN-OeErNi-Clie H9O.

. Ha rm en lencdiamln-acetone- Water-.5 me.

Application filed February 24, 1923. Serial No. 621,082.

The reactions illustrated above show the formation of para phenylenediamin-acetone- .sodium b sulphite. This compound tends to dissociate. with the formation of para phenylenediamin insmall concentration. It is in this way that we get the muzzling effect.

My invention consists in the chemical combination with the aromatic amine compound,

such as para phenylenediamin of a carbonyl containing compound, of the type formula RCzOR where R and B may be H or organic radicals connected through carbon, such asla ketone or an aldehyde (acetone, formaldehyde, acetaldehyde, etc.) to pro: duce a nontoxic mixture. To make this mixture soluble in water there is combined therewith a sulfur containing compound, such as sodium bisulfite or sodium sulfoxylate.

The following is the best example of my improved hair dye which 1" have produced with the proportions given by weight.

I dissolve 1 to 5 arts of para phenylene- 'diamin ((1 11 (NH, in 100 parts of water and add thereto 11} to 7?; parts of acetone sodium bisulfite (C l-1,30 1%.) which chem ically combines with the amine to form the triple compound para phenylenediamin-acetone sodium bisulfite (C,H,,N,SO,Na). lhis compound may be used for dyeing in the usual manner by the addition of a suitable oxidizing agent, such as hydrogen peroxide.

While I have described this invention as a hair dye, it is suitable for other purposes,

such as dyeing fur, feathers, etc., hence it do not wish to limit myself to a hair dye, has

What I claim is 1. A dye including an aromatic amino compound chemically coupled ,with a carbon 1 containing compound of the type formn a RCzOR where R and B may H or organic radicals connected through carbon. 2.' A dye including an aromatic .1. compound chemically coupled with a car,-

bonyl containing compound of the v w formula RCzOR' where R and B may Her organic radicals connected through carbon, and a sulfur containing wund.

3. A dye includin and acetone sodium isulfite.

4. A. dye including para phenylenediemin are. phenylene .1

and acetone sodium bisulfite in the substan-- tial proportions of 1 to 5 parts of para phenylenediamin and 1% to 71} parts of acetone sodium bisulfite.

5. A dye including Water, para phenylenediamin and acetone sodium bisulfite in the substantial proportions of 100 parts of Water; 1 to 5 parts of para phenylenediamin, End 1% to 7% parts of acetone sodium bisul- In testimony, that I claim the foregoing as my invention, I have signed my name this 19th day of February, 1923.

RALPH L. EVANS. 

